DE2844786A1 - ONE-PIECE, WRAPPED CONTACT - Google Patents

Description

ΡΑΤΚΝΤ ^ Ν \ Λ / ΆΙ_ΓΕ Α. GRÜNECKER

H. KINKELDEY

OR-INd

ORINd

2844786 w. Stockmair

OR-INCl-AaE ICALTECX

K. SCHUMANN

DR RER NAT. ' OPL-PHVS

P. H. JAKOB

G. BEZOLD

DRnERNAT-D (PL-CHEU

8 MUNICH

MAXIMILIANSTRASSE

P 13 183

One-piece, coated contact

The invention relates to an electrical contact, in particular to a contact made in one piece from a single piece of sheet metal in the form of a wide variety of contacts Types of electrical connectors that can be used, jacketed contact socket for receiving a complementary contact pin.

In the fields of traffic and communication and in computing, there has been an increasing need for electrical connectors for some time, which can be used under the most unfavorable environmental conditions and

909817/0773

TELEPHONE (089) 939863 TELEX OB-SBaSO TELEGRAMS MONAPAT TELEKOPfEBER

28A4786

at the same time they are easy to maintain and repair. In response to this need, various connectors have been developed in which the contacts are within a fit are securely sealed and individual contacts can be replaced if necessary. With a connector of this type, the rear end of the fitting, which receives a connected conductor, is closed with an elastic sealing insert which is penetrated by narrow passages is through which the individual contacts can be introduced into and removed from the connector. Typical examples of such connectors are shown in U.S. Patents 3,336,569, 3,512,119, 3,786,396 and US Pat 3,960,428. However, these connectors have the disadvantage that the contacts are damaged during installation can and / or that the sealing insert can be cut or torn so that its Sealing effect is in question. These disadvantages are particularly serious in the case of socket contacts with elastic tongues or fingers punched out of their walls.

Furthermore, there is a tendency to continue to reduce the dimensions of electrical connectors, wherein then the contacts also become smaller and more susceptible to damage.

To counter this disadvantage, contacts used in such connectors, especially socket contacts, often surrounded by a coat, which is the active contact element, in particular protects the tongues or fingers from damage when installing the contact. The jacket also prevents the active contact elements from being deformed beyond their elastic limit, which would make it necessary to change the contact.

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Known jacketed contacts usually expose themselves at least two parts together, namely the actual contact, which can be formed from sheet metal, for example, and a jacket, which is usually made by boring out a rod-shaped material by means of a worm gear or the like .. The manufacture of the at least two parts and their subsequent assembly inevitably requires one high expenditure of time, costs and work.

It is therefore an object of the invention to provide one Sheathed contact that can be produced from a single piece of sheet metal.

Another goal is to create a one-piece, jacketed contact with a crimp connection element, which facilities for the precise alignment of a conductor to be connected as well as for the visual inspection of the connection having.

Yet another object of the invention is to provide an integral, sheathed contact with molded in sheath openings for the visual inspection and adjustment of contact fingers of the active contact element.

Another object of the invention is to create a nub contact of the type mentioned, which can be produced economically in large numbers and all at the Use in a common connector is sufficient.

Furthermore, the invention aims to create a one-piece, encased contact, which on the outside does not have any edges that cut into a sealing insert having.

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The invention thus provides one in an electric Connector usable contact, which covered all the advantages of the known, composed of several parts Has contacts and can be produced with less expenditure of time and money. The contact is off a one-piece, stamped sheet metal blank and has a cooperating with a complementary pin contact active contact part, a connection part for. the connection of an electrical conductor and one that active contact part protectively surrounding jacket. As a result, the sensitive parts are themselves very small socket contacts Safely protected during transport, installation and use in a connector. The outside of the jacket is relatively smooth and free of sharp edges which cut into the seals of a connector could.

The characterizing features of the invention are outlined in the claims. Embodiments of the invention are explained below with reference to the drawing. Show it:

Fig. 1 is a front view of a one-piece sheet metal blank for a jacketed socket contact in a first embodiment of the invention,

FIG. 2 shows a front view of the blank folded over one another in a first method step according to FIG Fig. 1,

Fig. 3 is a front view of the folded over blank according to Fig. 2 when rolling the same to a socket contact,

Fig. 4 is a front view of one from the blank according to Fig. 1 fully formed socket contact,

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Pig. Figure 5 is a sectional view taken along line 5-5 in Fig. 1,

Pig. 6 is a sectional view taken along line 6-6 of Pig. 2,

Pig. Figure 7 is a sectional view taken along line 7-7 in Pig. 3,

Pig. Figure 8 is a sectional view taken along line 8-8 of Pig. 4,

Pig. 9 is a sectional view taken along line 9-9 of Pig. 4,

Pig. 10 is a partial view in section along the line 10-10 in Pig. 4,

Pig. 11 a pig. 10 corresponding sectional view with a ladder stop brought into the position of use in the connection part of the connector,

Pig. 12 is a partial view of a modified embodiment of the Pig. 4 socket contact shown with an additional socket surrounding the connector,

Pig. Figure 13 is a partial sectional view taken along line 13-13 of Pig. 12,

Pig. 14 is a partial perspective view of another embodiment form of a connector for the contact according to ÜB- 4,

Pig. Figure 15 is a sectional view taken along line 15-15 of Pig. 14,

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Pig. 16 is a front view of a one-piece sheet metal blank for a socket contact in a second Embodiment of the invention,

FIG. 17 is a front view of the blank according to FIG. 16 after performing a first process step for forming the contact,

18 shows a front view of the blank after executing a further method step,

19 shows a front view of the blank according to FIG. 16 when it is rolled up into a sleeve-shaped one Structure,

FIG. 20 shows a front view of the socket contact completely formed from the blank according to FIG. 16;

FIG. 21 is a sectional view taken along line 21-21 in FIG. 16;

FIG. 22 is a sectional view taken along line 22-22 in FIG. 17;

Figure 23 is a sectional view taken along line 23-23 in Fig. 18,

Figure 24 is a sectional view taken along line 24-24 in Fig. 19 and

FIG. 25 is a sectional view taken along line 25-25 in FIG. 20.

In Figs. 1 to 11, the method steps in the production of a socket contact 10 from a one-piece Sheet metal blank shown in a first embodiment of the invention.

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One in Pig. 1 shown blank 11 has a first rectangular Part 13 »from which the jacket of the socket contact 10 shown in Fig. 4- is formed, and a second, narrower rectangular part 15 »from which the actual Contact is formed. For the sake of clarity, the parts 13 and 15 of the blank 11 in FIG. 1 are through a dashed line 17 separated from one another.

To produce the contact 10 shown in FIG if the blank 11 is first folded over one another, see above that the parts 13 and 15 come to rest on each other, whereupon dor folded over blank then into one sleeve-shaped structure is rolled up (Fig. 2, 3)

The socket contact 10 shown in Fig. 4- has a front one End 19 and a rear end 21. Resilient fingers 23, 25 formed near the front end of the inner part 15 resiliently engage a complementary pin contact introduced into the front end and thus provide the active contact part of the contact. The fingers 23 »25 are through cuts 27 punched in the blank 11 and 29 limited and protrude within the contact 10 in the direction of the front end 19 thereof. the Kontaktfiriger 23 »25 or optionally also the entire inner surface of the inner part 15 can or can with a layer made of a precious metal, such as gold, be provided.

A pair of openings 35 »penetrating the casing part 13» is arranged so that the openings after the folding over and rolling of the blank 11 over the contact fingers 23 and 25 respectively. The fingers are then accessible from the outside through the openings and can go inwards be bent or biased so that they are introduced into the contact with the necessary pressure on one Attack pin contact.

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The connection part of the jacketed socket contact 10 according to FIGS. 1 to 11 is preferably in the form of a closed one Squeeze bushing executed. Since the two parts 13 and 15 of the blank 11 have substantially the same length, the rear end 21 of the contact 10 is a double-walled one Compression socket.

The jacket part 15 has an opening 39 »which, after the blank has been folded over and rolled up. 11 comes to rest over a tab 4-1 formed in the inner part 15. The tab 4-1 can be bent inwards through the opening 39 and then forms a stop for an electrical conductor inserted into the rear end 21 of the contact (FIG. 11). When the tab 41 is bent inwards, an opening 43 is created in the inner part 15 which is aligned with the opening of the jacket and through which the inserted conductor can be seen in order to determine whether it is in contact with the stop 41. The free, rear end of the inner part 15 has a beveled inner edge 45, which facilitates the introduction of the conductor and prevents scratching or other damage to the conductor. \ The bush-shaped connecting part 21, by means of a conventional crimping crimped onto the conductors to make this mechanically and electrically connect with the socket contact 10 degrees.

To adapt the socket contact 10 to the dimensions of the contact chambers of one intended for its inclusion Connector, the blank 11 can be made wider or narrower. The inner part 15 must each be narrower than the shell part 13 so that it is the inner circumference of the shell when the blank is rolled up adapts. As can be seen in particular from Fig. 2, the width of the two parts 13 and 15 is coordinated so that that the bands of the two parts butt against each other after the blank has been rolled up.

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The shell part 13 can at its side edges with oppositely projecting tabs 4-7, 4-9, which serve to hold an additional retaining collar 51 to shape. The retaining collar 51 shown in particular in FIG. 4 enables the use of the contact 10 in FIG common prevention, which have a seat for the inclusion of such a covenant. To manufacture the In an initial process step, a bead 51 is created between the two tabs 4-7 »4-9 across the bunds Sheath part 13 formed away. When you then fold over each other and the blank is then rolled into the annular retaining collar 51 (FIGS. 2 to 4).

The one in Pig. 1 to 11 thus has a socket contact that is surrounded by the jacket over its entire length inner bushing, which is one-piece with the contact finger protruding in a cantilevered manner in the direction of the front end having. The sheath not only protects the contact fingers, but also prevents them from being inserted too thick a pin contact into the socket contact.

When the connector 21 is squeezed together for connection of a conductor at the contact 10, it can happen that the butted edges are relative to one another move. When installing or removing the contact in or from a connector, it is then possible that a tool commonly used for this purpose can no longer be placed on the connecting part 21. To prevent this, you can the abutting edges 53 of the jacket 13 are welded together (Fig. 4-). To facilitate welding the edges of the blank 11 can preferably be designed so that the butt joint of the jacket then is offset in the circumferential direction with respect to that of the inner part.

The undesired deformation of the connecting part of the Buchsenkonatkts can also without welding the edges by the

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Use of a socket 55 shown in FIGS. 12 and 13 pushed onto the connecting part can be prevented. The inner part 15 is shortened here up to the dashed line in FIG. 1, and the jacket part 13 of the blank is drawn in a little so that the contact along its connecting part 59 has a smaller outer diameter Has. After the socket 55 has been pushed onto the connector 59, its free edge 61 is slightly flanged, see above that the socket 55 can not be removed from it.

In another embodiment shown in FIGS. 14 and 15, the inner part 15 extends over the jacket 13 addition and forms at the connection end of the contact 10 a U-shaped squeeze profile 63. This can be a first Section 65 for holding and connecting an electrical conductor and a second section 67 for holding the insulation of the conductor and for strain relief of the connection.

Another advantageous embodiment of the invention is shown in FIGS. The one shown here Socket contact is also formed from a one-piece blank 71, which, however, is used for completion of a jacketed contact is not folded over one another, but merely rolled up. The one from the blank 71 shaped contact 70 has a jacket 72 with a front end piece 73 for receiving a contact pin and a pinch socket designed as a connector 75 arc posterior end. Along the side edges of the front end piece 73 extend in a certain distance two contact fingers 77, 79 »which at their, the rear ends merge into two tabs 81 and 83, respectively, which form an inner part 80.

The contact 70 is formed in the manner shown in FIG. 17 to 25 illustrated manner by first removing the tabs

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81, 83 are angled forward so that the fingers 77 »79 are substantially at right angles at a certain distance run to the plane of the jacket part 72 of the blank. The fingers 77-79 are now slightly curled so that they get a curved profile, and then bent inward until it and the tabs 81, 83 on the front of the shell part 72 bear (Fig. 18, 23). Finally, the blank is then rolled up as shown in FIGS. 19 and 24 and thereby becomes that shown in Figs socket-shaped shape.

The completed contact 70 shown in FIGS. 20 and 25 has a jacket 72 and an inner part with two cantilevered forward contact catchers 77-79 for the attack on a pin contact inserted into the front end piece 73. Openings 85, 87 formed in the blank 71 lie in the case of the fully formed contact 70 over the contact fingers 77 and 79 'so that they pass through the openings bent through or can be biased for the plant on a contact pin.

The socket contacts described above in various embodiments are each advantageously Formed from a one-piece sheet metal blank and have an active contact element at the front end and an active contact element at the rear end a connection element and a jacket surrounding the active contact element in a protective manner. The one-piece blanks can be punched from a sheet metal strip of any length and shaped into socket-shaped contacts. To a To ensure a secure connection, only the contact fingers need to be coated with precious metal, which increases the manufacturing costs compared to conventional contacts, which require larger areas with a support are provided, significantly reduce.

The blanks 11 and 71 are preferably made of thin Sheet metal punched from cadmium or beryllium copper.

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In Pig. 1 and 16 is only one blank 11 each or 71 shown, for the production of large numbers of However, such blanks can be continuously punched from a sheet metal strip or strip of any length will. The blanks can initially hang on the strip and only during the shaping of the Contacts are separated from them or only afterwards. The finished contacts can also be attached to such a strip hangblexben and be reeled up with this, so that they can later by means of automatic connecting devices can be further processed.

The dimensions used in the description and the claims such as "front", "rear" and the like. Relate on the positions of the blanks and contacts shown in the drawing. This information is for the purpose only better understanding. In reality, the contacts can be molded and used in any orientation will.

The finished contacts 10 shown in FIGS. 4 and 20 and 70 each have a jacket, which is a substantially smooth outer surface without any sharp edges Has. This enables the contacts to be introduced into the narrow openings of a sealing insert on a connector facilitated without the insert being cut or torn. In particular, there is none in the longitudinal direction There are running edges which cut into the sealing insert when the contact is installed or removed could.

All advantages and features of the invention that emerge from the description, the claims and the drawing, including structural details, spatial arrangements and procedural steps, can both be essential to the invention by itself as well as in any combination.

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Claims (16)

PATENT ADVOCATES A. GRÜNECKER CKPU-INQ H. KINKELDEY DR-ING W. STOCKMAIR DR-ING.-Art ICALtECH 2844786 κ. Schumann . OR HSl MAT-OPL-PHVS P. H. JAKOB G. BEZOLD DR RER NAT- CtPL-CHEM. 8 MUNICH MAXIMILIANSTRASSE October 13, 1978 P 13 183 BUNKER EAMO CORPORATION 900 Commerce Drive, Oak Brook, Illinois 60521, USA Λ.Ι Elongated electrical contact formed from a one-piece sheet metal blank, marked by an active contact element formed at one end (19) with an electrically conductive attack on one. Resilient contact fingers (23 »25) which can be brought into pin contact» by a connector (21) formed at the other end with devices for the mechanical and electrical connection of a conductor and by a protective jacket (13) surrounding the active contact element · 2. Contact according to claim 1, characterized in that g e k e η η, that the jacket (13) has a relatively smooth outer surface without sharp edges. 3. Contact according to claim 1, characterized in that the active contact element (19) and the connecting part (21) are formed from the end pieces of a one-piece, tubular inner part (15) and that the jacket (13) the active contact element coaxially surrounds and is connected in one piece to the inner part at the first end (19) of the contact (10). 909817/0773 TELEPHONE (OSS) 22 28Θ2 TELEX OS-SSSBO TELEGRAMS MONAPAT TELECOPER 4. Contact according to claim 3 »characterized in that the active contact element at least has a cantilevered contact finger (23, 25) which at one end is integral with the inner part (15) and extends inwardly therefrom and forward toward the first end (19). 5 · Contact according to claim 4, characterized in that g e k e η η draw , t that the contact el em ent two diametrically opposed, cantilevered contact fingers (23, 25) contains. 6. Contact according to claim 3 »characterized in that the connecting part is closed A pinch socket (21) and a tab (41) which represents a stop for the conductor and which at one end is integrally connected to the inner part (15) and protrudes inwardly therefrom with its free end in the radial direction, and that the jacket (13) surrounds the compression sleeve coaxially and has a viewing opening (39) located above the tab. 7. Contact according to claim 3 »characterized in that the jacket (13) has at least one Access opening (35 »37), which each over a cantilevered finger (23, 25) of the active contact element lies. 8. Contact according to claim 3? characterized in that the jacket (13) has an annular, having radially outwardly protruding collar (51). 9- contact according to claim 4, characterized in that the jacket (13) the inner part (15) surrounds coaxially and extends rearwardly beyond this to form the connecting part. 909817/0773 10. Contact according to claim 3 »characterized in that the jacket (72) along a itself between the ends of the contact (70) in the longitudinal direction thereof extending connecting line in one piece with the inner part (81, 83) is connected. 11. Contact according to claim 4-, characterized in that the first end (19) has an opening for inserting a pin contact has that the inner part (15) and the jacket (13) at the other end (21) surround an opening for inserting a conductor, and that the inner part has an incision (29, 31), within which the contact finger (23 or 25) protrudes inward and forward towards the first end. 12. Contact according to claim 5 »characterized in that the jacket (13) has a second opening (35 * 37), which is above the second contact finger (23 or 25). 13. Contact according to claim 6, characterized in that the inner part (15) over the Length of the jacket (13) extends. 14. Contact according to claim 6, characterized in that the inner part (15) on the rear end of the jacket (13) extends out and beyond the same a substantially U-shaped Has crimp profile (63) for connecting a conductor wire. 15. Contact according to claim 4, characterized in that g e k e η η ζ e i chnet that the active contact element several forward within the tubular jacket (72) extending contact fingers (77 »79), which a 9 0 9 3 17/0773 a pin contact have complementary, concavely curved profile, and that the contact fingers each have a, in the middle area of the contact (70) arranged tab (81 or 83) along a longitudinal direction of the contact extending connecting line are integrally connected to the jacket (72). 16. Elongated electrical contact formed from a one-piece sheet metal blank, characterized by an opening at one end (19) of the contact (10) surrounding the active contact element with contact fingers resiliently resilient in the radial direction (231 25) for attacking a complementary pin contact, through an opening at the other end (21) of the contact and thus an integral connection part Devices for the mechanical and electrical connection of an electrical conductor and through a open at both ends, the active contact element coaxially surrounding and protective jacket (13) »which has a relatively smooth outer surface with no sharp edges. 909817/0773